Phosphorus is critical for photosynthesis and growth. If you find your plants are slow-growing or notice the foliage changing from a vibrant green to purplish-red or blue, a phosphorus deficiency may be the problem.
Plants need nitrogen for the same reason that humans need nitrogen: to form amino acids. Amino acids are nitrogen-containing compounds that make up proteins.
In order to understand fulvic acid, we need to revisit our elementary school science curriculum for a quick refresher on soil, that dark and magical substance from whence all life springs.
Plants need minerals to survive and grow. Minerals are necessary for everything from the creation of proteins to photosynthesis. Learn more in this post about soil fertility!